There can be no such thing as a copyright for a special purpose or for a special locality, or under other special conditions, for there can be only one copyright, and that a general copyright, in any one work. But specific contracts can be made, enforceable under the law of contracts, as for the sale of a copyrighted book within a certain territory, provided such contracts or limitations are not contrary to other laws. Although record of assignment in the Copyright Office is provided for by the law only for the copyright in general, the separate estates as a right to publish in a periodical and the right to publish as a book may be sold and assigned separately, and the special assignment recorded in the Copyright Office, though this does not convey a right to substitute in the copyright notice a name other than that of the recorded proprietor of the general copyright, which can only be changed as specifically provided in the law under recorded assignment of the entire copyright. {Sidenote: Copyright as monopoly} Copyright is a monopoly to which the government assures protection in granting the copyright. It is a monopoly not in the offensive sense, but in the sense of private and personal ownership; the public is not the loser but is the gainer by the protection and encouragement given to the author. The whole aim of copyright protection is to permit the author to sell as he pleases and to transfer his rights collectively or severally to such assigns as he may choose. Copyright is a monopoly only in the sense that any ownership is a monopoly. Says Herbert Spencer: "If I am a monopolist, so also are you; so also is every man. If I have no right to those products of my brain, neither have you to those of your hands. No one can become the sole owner of any article whatever; and all property is 'robbery.'" In the copyright debates of 1891, Senator O. H. Platt rightly said: "The very essence of copyright is the privilege of controlling the market. That is the only way in which a man's property in the work of his brain can be assured." And as Senator Evarts pointed out in the same debate: "The sole question is what we shall do concerning something which is the essential nature of copyright and patent protection, namely, monopoly." In discussing patent monopoly and the law of contracts in Victor Talking Machine Co. _v._ The Fair, the U. S. Circuit Court of Appeals, through Judge Baker, said, in 1903, that "within his domain the patentee is czar. The people must take the invention on the terms he dictates or let it alone for seventeen years." Thus as the government grants and guarantees the monopoly, it is not to be taken as in restraint of trade or otherwise contrary to law. Said Judge Cullen in the case of Murphy _v._ Christian Press Association, in the Appellate Division of the N. Y. Supreme Court, in 1899, decisions as to agreements in restraint of trade "have no application to agreements